text: // Test #if defined() guards.
  //- @M0 defines M0
  //- M0 named Name0
  #define M0 1
  //- @M0 ref/queries M0
  #if defined(M0)
  #endif
  #undef M0
  //- @M0 ref/queries Name0
  #if defined(M0)
  #endif
  //- @M0 defines OtherM0
  #define M0 1
  //- @M0 ref/queries OtherM0
  #if defined(M0)
  #endif
  